參數(shù)資料
型號: MC68HC08LT8CFGE
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP44
封裝: 10 X 10 MM, 1.40 MM THICKNESS, 0.80 MM PITCH, ROHS COMPLIANT, MS-026BCB, LQFP-44
文件頁數(shù): 119/156頁
文件大?。?/td> 1107K
代理商: MC68HC08LT8CFGE
I/O Registers
MC68HC08LT8 Data Sheet, Rev. 1
Freescale Semiconductor
65
6.9.2 TIM Counter Registers
The two read-only TIM counter registers contain the high and low bytes of the value in the TIM counter.
Reading the high byte (TCNTH) latches the contents of the low byte (TCNTL) into a buffer. Subsequent
reads of TCNTH do not affect the latched TCNTL value until TCNTL is read. Reset clears the TIM counter
registers. Setting the TIM reset bit (TRST) also clears the TIM counter registers.
NOTE
If you read TCNTH during a break interrupt, be sure to unlatch TCNTL by
reading TCNTL before exiting the break interrupt. Otherwise, TCNTL
retains the value latched during the break.
6.9.3 TIM Counter Modulo Registers
The read/write TIM modulo registers contain the modulo value for the TIM counter. When the TIM counter
reaches the modulo value, the overflow flag (TOF) becomes set, and the TIM counter resumes counting
from $0000 at the next timer clock. Writing to the high byte (TMODH) inhibits the TOF bit and overflow
interrupts until the low byte (TMODL) is written. Reset sets the TIM counter modulo registers.
NOTE
Reset the TIM counter before writing to the TIM counter modulo registers.
Address: T1CNTH, $0021 and T2CNTH, $002C
Bit 7
654321
Bit 0
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
00000000
Figure 6-5. TIM Counter Registers High (TCNTH)
Address: T1CNTL, $0022 and T2CNTL, $002D
Bit 7
654321
Bit 0
Read:
Bit 7
654321
Bit 0
Write:
Reset:
00000000
Figure 6-6. TIM Counter Registers Low (TCNTL)
Address: T1MODH, $0023 and T2MODH, $002E
Bit 7
654321
Bit 0
Read:
Bit 15
14
13
12
11
10
9
Bit 8
Write:
Reset:
11111111
Figure 6-7. TIM Counter Modulo Register High (TMODH)
Address: T1MODL, $0024 and T2MODL, $002F
Bit 7
654321
Bit 0
Read:
Bit 7
654321
Bit 0
Write:
Reset:
11111111
Figure 6-8. TIM Counter Modulo Register Low (TMODL)
相關(guān)PDF資料
PDF描述
MC68HC11G5CFN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC84
MC68HC11G5CFN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC84
MC68HC11L6VFU23 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQFP64
MC68HC11L6CFU22 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64
MC68HC11L6VFU22 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC08MR4 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:In-Circuit Simulator
MC68HC08P4 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT
MC68HC08QT1 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers
MC68HC08QT2 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers
MC68HC08QT4 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers